61505450225511 has 8 divisors (see below), whose sum is σ = 82008650569584. Its totient is φ = 41002941682560.

The previous prime is 61505450225501. The next prime is 61505450225591. The reversal of 61505450225511 is 11552205450516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61505450225511 - 2⁷ = 61505450225383 is a prime.

It is a super-2 number, since 2×61505450225511² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61505450225501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172742796 + ... + 173098481.

It is an arithmetic number, because the mean of its divisors is an integer number (10251081321198).

Almost surely, 2^{61505450225511} is an apocalyptic number.

61505450225511 is a deficient number, since it is larger than the sum of its proper divisors (20503200344073).

61505450225511 is a wasteful number, since it uses less digits than its factorization.

61505450225511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345900561.

The product of its (nonzero) digits is 300000, while the sum is 42.

The spelling of 61505450225511 in words is "sixty-one trillion, five hundred five billion, four hundred fifty million, two hundred twenty-five thousand, five hundred eleven".